Improve logic related to error handling on SiteExists call
Improve logic related to error handling on SiteExists call

No need to check if SiteExists if the config is not managed or the name
does not even qualify.

joshix/caddy,devangels/caddy,pyed/caddy,ollie314/caddy,tobya/caddy,pyed/caddy,DenBeke/caddy,elcore/caddy,cez81/caddy,cez81/caddy,tw4452852/caddy,captncraig/caddy,yukimochi/caddy,DenBeke/caddy,ollie314/caddy,dusty/caddy,pyed/caddy,captncraig/caddy,dusty/caddy,elcore/caddy,devangels/caddy,pyed/caddy,dusty/caddy,yukimochi/caddy,tw4452852/caddy,DenBeke/caddy,ollie314/caddy,joshix/caddy,elcore/caddy,tobya/caddy,devangels/caddy,joshix/caddy,dusty/caddy,tw4452852/caddy,tw4452852/caddy,DenBeke/caddy,cez81/caddy,captncraig/caddy,tobya/caddy,tobya/caddy,yukimochi/caddy,ollie314/caddy